I've been reviewing a D600 over the last few days - here's a time lapse test.

It's a handy little feature to have in camera - nowhere near as reliable or creative as taking stills with an intervalometer and adjusting in Lightroom before processing as a movie clip, but it's advantageous in terms of storage space in camera if you're travelling.

I had a 3 stop ND and could only get to 1/60th at ISO100 and f16, but as a quick test this is quite successful:

Dubaiphil - Is that similar to the Pentax K30's Interval Movie function? It records JPEGs at 3-5-10-30-seconds, 1-5-10-30-60-minutes. Up to 999 images. Duration can be 12 seconds to 99 hours.

You can preset, then delay the start time - that's a 'clock' setting - 8:05am, so on.

If you record, say, 900 images, the camera turns those into an MJPEG (Motion JPEG) video, which at 30fps plays for 30-seconds, on any device that can play videos with the *.avi container. Max is only about 33-seconds.

For power, you can use the Li-Ion power pack, or 4 rechargeable AAs (I'm using Eneloops) in the optional holder. For longer periods you could use 4 x AA Lithiums instead - will probably double the working time (Eneloops do 800 shots, Lithium AAs, 1,600 shots.) Or as the manual advises, for long periods, the optional mains adapter.

Unfortunately, the camera can't turn the time-video into the H264/MOV it does its other video in - but you could convert them to H264 / Xvid4 / MPEG4 quite easily with Avidemux or other editor.